Q: 1. Ans: Yes, nuisance is present. The bad smell from toxins disturbs A while walking. It affects his comfort and daily routine. So, it is a nuisance.
Q: 2. Ans: The local authority (like government or road management) can be responsible. They should repair the road and keep it safe. The big hole caused danger and the accident.
Q: 3. Ans: C is mostly responsible for her own actions. She entered the pool without permission. But D can also be partly responsible if the gate was left open and unsafe.